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Q.

Loudness of sound waves is measured by unit ____.

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Detailed Solution

Loudness of sound waves is measured by unit Decibel (dB).
Loudness of sound waves is basically related to the intensity of the sound provided and loudness of sound waves is directly proportional to the square of its amplitude of wave which is given by

I α A^{2}

Where,

I = intensity

of the sound wave and

A = amplitude

Noise or loudness of a sound wave is measured in Decibel (Db), it is named after Alexander Graham Bell who invented telephone and audiometer.

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